Sash pulley



Feb. 16, 1932. J. F. SEELBACH 1,845,631

l SASH'PULLEY Filed June 1929 IN VEN TOR ATTORNEYS Cil Patented Feb. 16,1932 Unirse srarus PATENT 1QFFIQE JOHN' F. SEELBACH, 0F GRAND RAPIDS,MICHIGAN, ASSIGNOR TO GRAND RAPIDS v HARDWARE CO., OF GRAND RAPIDS,MICHIGAN SASH PULLEY Application filed .Tune 3, 1929. Serial No.367,860.

This invention relates to improvements in sash pulleys made of metalstampings.

The objects of the invention are:

First, to provide an improved casing for such a sash pulley.

Second, to provide such a casing with an improved guide for the cord. Y

Third, to provide such a structure which lends itself very readily toeither ball or plain bearings.

Objects pertaining to details and economies of construction andoperation will definitely appear 'from the description to follow.Preferred embodiments of my invention are ile lustrated in theaccompanying drawings, in which:

Fig. 1 is a side elevation view of my improved sash pulley,rthe upperpart of the face plate being in section to show the method ofconstruction, and the ends of the cord being cut away.

Fig. 2 is an enlarged detail vertical sectional view on lineQ--Ql ofFig. 1 through the center of the casing and the pulley wheel,

'i showing details of construction of the ball bearing sash pulley.

Fig. 3 is an enlarged detail transverse sectional view on line 3--3 ofFigs. l and 2, showing details or construction of the face plate andguide and the method of attaching the same to the body of the pulleycase.

Fig. 4 is a detail side elevation view of thek pulley case detached. l

Fig. 5 is a modified form oi' the same, in which the back or inner sideis left open, and a usual bearing pin is provided.

Fig. 6 is an enlarged detail of the pulley wheel adapted to a plainbearing, a part being broken away to show details of construction.

The parts will be identified by their numerals of reference which arethe same in all the views.

The pulley casing 1 is made up of a pair of side pieces 2, 2, identicalin form, which are joined together by a spun joint 3, see Fig. 2. Afront flange plate 4 is secured in place by attaching lugs 41 engagingthrough apertures 21 in the side members 2. A cover plate 5,corresponding to the face plate 4, is secured in place by especial upseteyelet structure 51 l riveting the parts togetherand forming the screwhole for attachment. rlhe cover plate 5is provided with a guide 6struck-up and formed integrally therewith, with a tangential opening 7at the under side. The struckup portion 6 ispreierably slightly morethan the thickness of the sash cord so that the sash cord is guidedstraight down in front of the cover plate 5.

The pulley wheel 8 is made up-of identical sidemembers 81, 81' suitablyconformed to make a groove for the pulleyi on'the outside and formagroove for the balls 9 of the ball bearing within. The sides of thecasingiare 'similarly conformed.

These parts are riveted together by struckup metal from one hallengaging apertures on the other somewhat in the form of an eyelet 10.This is a usual method of connecting sheets of metal together. Where itis desired to make a plain bearing the halves 81 are eX- tendedinternally into annular ring-like projections 82, the two halves exactlyconforming to it the bearing surface provided for the balls, and provinga very eifective structure where a plain bearing is desired, orrequired.

An inspection will show that the flange 4 and the cover flange 5 mightbe made integral and be provided with lugs comparable to the lugs 41 forattaching the same. However, it is preferred to provide a separateflange from the cover flange because in that way a comparatively heavyflange can be produced from light metal which is easy7 to work, whereas,if a single iiange was provided, it would be quite desirable to make itmuch heavier than would be required for the guide 6. It is, therefore,preferred to make thestructure of two pieces of metal.

The sides of the pulley case can be made in the form indicated in Fig.5, which is a little more readily formed than the preferred form and isprovided with a bearing pin. By making it of the right width, the cordwill pass down without obstruction although not so completely guided asin the preferred construction. The ange plate and cover plate or thecover plate alone may be attached, such cover having the tangentialopening.

It will be seen from this description that this structure is capable ofquite considerable modification without departing from my invention. Iam aware that structures of the iin form have been heretofore produced.I am making a special form which is economical to produce and verystrong, requiring but a minimum of metal, and, at the same time, thesash cord is completely and fully guided and protected from injury tothe maximum eX- tent.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent, is: f

A sash pulley construction of metal stampings7 comprising a casing madeup of opposed symmetrical halves retained together at the central pointby rivet portion and conformed centrally as a bearing for the pulleywheel, one side of the said casing being left open and plane, and theother side being provided with a tangential aperture for the cord, aface flange plate secured to the said pull-ey case by suitable lugsinserted in apertures through the sides thereof, and a cover plate witha flange corresponding to the face flange and having struck-up cordguide guard and portion with tangential opening at the bottom.

In witness whereof I have hereunto set my hand. Y

JOHN F. SEELBACH.

